/* ==========================================================================
   ExamCracker AI - CBT (Computer Based Test) Simulator Engine CSS
   ========================================================================== */

.cbt-container {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 24px;
  min-height: calc(100vh - var(--header-height) - 64px);
}

/* Left: Main Question Arena */
.cbt-main-arena {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
}

.cbt-top-bar {
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(15, 23, 42, 0.6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.cbt-subject-tag {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-main);
}

.cbt-marking-scheme {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 12px;
}

.mark-pos { color: var(--emerald-green); }
.mark-neg { color: var(--crimson-alert); }

/* Question Display */
.cbt-question-body {
  padding: 32px;
  flex: 1;
  overflow-y: auto;
}

.q-header-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.q-number-pill {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 800;
  padding: 4px 10px;
  background: var(--primary-glow);
  border: 1px solid var(--border-glow);
  color: var(--primary-light);
  border-radius: var(--radius-sm);
}

.q-topic-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.question-text {
  font-size: 1.15rem;
  font-weight: 500;
  line-height: 1.65;
  color: #fff;
  margin-bottom: 28px;
}

/* Option Choices */
.options-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.option-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 20px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}

.option-item:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.16);
}

.option-item.selected {
  background: rgba(99, 102, 241, 0.16);
  border-color: var(--primary);
  box-shadow: 0 0 16px rgba(99, 102, 241, 0.25);
}

.option-letter {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.option-item.selected .option-letter {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.option-content {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--text-main);
  padding-top: 2px;
}

/* CBT Bottom Controls */
.cbt-action-footer {
  padding: 20px 28px;
  border-top: 1px solid var(--border-subtle);
  background: rgba(15, 23, 42, 0.7);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-left, .footer-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Right: Palette & Timers */
.cbt-sidebar-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.cbt-timer-card {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
  margin-bottom: 20px;
}

.timer-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-dim);
  font-weight: 700;
  letter-spacing: 0.5px;
}

.timer-clock {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--amber-gold);
  letter-spacing: 1px;
  margin-top: 4px;
}

/* Palette Legend */
.palette-legend {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 20px;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

.legend-dot {
  width: 14px;
  height: 14px;
  border-radius: 4px;
}

.dot-answered { background: var(--emerald-green); }
.dot-review { background: var(--purple-accent); }
.dot-not-answered { background: var(--crimson-alert); }
.dot-not-visited { background: #334155; }

/* Palette Numbers Grid */
.palette-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  max-height: 240px;
  overflow-y: auto;
  padding: 4px;
  margin-bottom: 24px;
}

.palette-btn {
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  background: #1e293b;
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: #fff;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.palette-btn:hover {
  border-color: var(--primary);
  transform: scale(1.05);
}

.palette-btn.current {
  border: 2px solid #fff;
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.4);
}

.palette-btn.status-answered {
  background: var(--emerald-green);
  color: #fff;
  border-color: #059669;
}

.palette-btn.status-review {
  background: var(--purple-accent);
  color: #fff;
  border-color: #7c3aed;
}

.palette-btn.status-not-answered {
  background: var(--crimson-alert);
  color: #fff;
}

/* Post-Test AI Diagnostic Results Modal */
.diagnostic-report-card {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.score-summary-banner {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.2) 0%, rgba(16, 185, 129, 0.2) 100%);
  border: 1px solid rgba(99, 102, 241, 0.4);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: space-around;
  text-align: center;
}

.ai-solution-box {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-top: 16px;
}

.solution-header {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--cyber-cyan);
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 10px;
}